EAN-13 Checksum Calculator - Free, Instant, In Your Browser
Enter the first 12 digits of an EAN-13 barcode to calculate its check digit (or all 13 digits to also validate it).
How to use EAN-13 Checksum Calculator
- 1Paste your text or data into the input box above.
- 2EAN-13 Checksum Calculator runs instantly, right in your browser.
- 3Copy the result or use it directly.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
Each of the first 12 digits is weighted 1 or 3 alternately; the check digit is whatever makes the total a multiple of 10.
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.